Sash lock



May 1932, Y W, EHRET 1,857,295

SASH LOCK Filed Feb. 11, 1951 Patented May 10, 1932 vUNITED STATI-:s

PATENTv OFFICE?- YALE w. nnanr, OIELKHART, INDIANA, AssIGNon fro THE AnIgAxn COMPANY,y or

CHICAGO, ILLINOIS, AOORPORATION or ILLINOIS j sAsIr Loox Application led February 11 1931. Serial No. 514,992

will therefore be described but kbriefly here.

When a lock of the so-called starter type is applied to a sash, thestarting element of the lock will sometimes cause trouble by not allowing the sealing strip on the bottom rail of the sash to seat snugly against the sill. This difficulty will occur whenever the latching element-which is connected with the starting element-is prevented for any reason from assuming its fully projected position just as the sash approaches the sill.

One of the objects of the present invention is to provide an improved starter type lock which will not interfere in any way with the closing movement of the sash to which applied.

Another object of the invention is to provide certain hereinafter described improvements in lock construction, which improvements, while applicable to locks of the starter type, may also be incorporated in locks of other types.

Still other Objects and advantages of the invention will be apparent upon a full understanding of the construction, arrangement and operation of the novel sash lock structure.

One form of the invention is presented herein by way of exemplification, but it will of course be a preciated that the invention is capable of em Odiment in other structurally modified forms coming equally within the scope of the appended claims.

In the accompanying drawings:

Fig. 1 is a fragmentary inside face view of a sash equipped with the improved lock, showing the sash in its fully closed position;

Fig. 2 is a similar view, Showing the sash in a raised position;

Fig. 3 is a horizontal section through the bottom rail of the sash, taken on the line 3-3 of Fig. 2; and

Fig. 4 is a vertical section through the bottom rail, taken on the line 4-4 of Fig. 1. n

The particular starter type lock which is illustrated in the drawings is substantially the same in general features of construction, arrangement and operation as the lock which forms the subject matter of an application for patent filed by Carl H. Larson on J anuary 17, 1931 under Serial No. 509,294', and

kAs will'be observed, the lock` includes a casing plate 10 which is attached to the bottom rail 11 of a sash; an operating lever 12 which is pivotedto the plate at 13 and has a normally inclined handle 14 in vertically spacedrelation to a'lifting flange 15 on the plate; a normally horizontal projection 16 on the lever which carries an anti-friction roller 17 for engagement with the raised inner portion 18 of the sill of the window frame; and

a bolt 19 whichis slidably mounted in a horizontalguideway 20 in one end of the bottom rail 11 in a normallyprojecting position.

The operating lever 12 is connected to the bolt 19 byv alink 21. One end of the link `21 is 'provided with a hole 22 through which a pin'23 on the lever extends, while the other endofthe link is provided with an axially elongated slot 24 through which a' pin 25 on the bolt extends. The link 21 passes through anaperturedend flange 26 on a reinforcing member 27 in the bottom rail, and is encompassed beyond the flange by two coil springs 28 and 29. The spring 28 is compressed be- -tween a washer 30 which abuts against the 4iian'ge 26 and afwasher 31 which abuts against across pin32 on the link,y and the spring 29 is compressed-fbuttoa less degree-between the inner end of .the bolt 19 and a washer 33 which abuts against the pin 32.

When the handle 14` is v,forced toward the ange 15, the nose ofthe bolt 19 will be ref tracted and the roller 17 will be moved downwardly into aposition beneath the pivotal axis13 of the lever, thereby forcing the sash ,up away from the sill. By reason of the over- Vrunning pin and slot connection between the bolt 1 9 and the link 21, and the double spring arrangement Afor holding the bolt normally projected, inward movement of the bolt from any `'cause other than'operation of the lever 12 will be taken upby the yield of the spring 29 only, with the resultthat the handle 14 will remain in thepos'ition shown and-the roller 17 will remain in its upwardly retracted positionclear of the sill. Y l Y While only one side of the sash is shown, it will of course beunderstood that another lock similar to the oneVv described willf'ortion is adapted to seat snugly against the outer sloping portion 37 of the rail, as shown in Figs. 1 and 4. In thisposit-ion of the sash it may happen that the latching bolts 19 may -be forced inwardlyby engagement of the same with the guides 34, either because no recesses are provided in the lower ends of the guides to accommodate the ends of the bolts, or because such recesses are improperly located, or else because the clearance between the sides ofthe sash 'and the guides is too small topermitiof full projection of the bolts Y even in the presence of recesses.Y It will read- LIii) ily be understood that, if the rollers 17 were forced to move downwardly whenever the noses of the bolts 19 were forced inwardly, a weather-tight seal couldnot be obtained between the bottom rail of the sash and the sill. `With the improved construction herein described, however, this trouble is wholly eliminated. Numerous other advantages derivable from this improved constructiomaside from the vstarting feature combination, vwill be obvious to those skilled 'in the Aart.

I claim: Y

l. In a sash lock of 'the starter type, in combination, a start-ingelement, a l'atching element, and Vasingle finger piece operable to 'simultaneously project ythe starting element and-retract thel-atchi-n'g element, said latching-element vbeing retractible upon the application of inwardly directed pressure -to the projecting end thereof without causing 'pro- 'jection of thea-'starting element.

2. In a sash lock ofthe starter type, in combination, a latchin'g element, a i'starting 'element Vwhich is connected with the vlatching element Yandis projected when the latching element -is retracted, means for retracting the latching element, Zand a 'spring in the Aconnection between the latching element 'and the starting element which yields without projecting the starting element when inwardly directed pressure is applied tothe projecting end of the latching element.V

3. Iln Ta sash lock, a supporting frame, fa latching bolt, an operating lever, a link extending between the bolt and the lever, yan end-play connection between the link and the bolt, a coil spring acting on the link to move the same in thev direction of projection of the bolt, and another coil spring acting on scribed my name. Y i, Y YLE W. EHRET."

'th'ebolt to take up'theslack afforded iby fthe end-play connection the direction of 'piro- 

